Back in 2010, President Obama tripped on the word corps.
Given that he is a highly educated person his faux pas was duly
criticized.

But it's not unusual for people to stumble on words borrowed from
other languages. In this regard, French is especially treacherous
in which about a quarter of the letters sit idle as if on strike,
adding little to the pronunciation.

As if that's not enough, there are complications of pluralization.
This week we've selected five words that are borrowed from French.
In the plural, even though the spelling stays the same as the
singular, their pronunciation changes. Though in French even the
plural pronunciation remains the same as in the singular.

corps

PRONUNCIATION:

(kohr)

plural corps (kohrz)

MEANING:

noun: A group of persons associated in a common organization or engaged in a common activity.